Crossfade MP3's (you know like Jam)

I want to create a mixed CD, crossfades, no gaps, but am not a DJ and can't do it real-time. Is there an alternative to (the now ancient) Jam by Roxio that allows you to manually arrange crossfades and then record?

I'd stick with Jam but am having some problems with audio quality - particularly on VBR or V. HQ MP3's. (I like the way it works visually, blending waveforms seems intuitive).

I thought it would be easy to find a newer app but so far no luck. Any ideas?